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Synchronize cRIO chassis to GPS (e.g. PPS or IRIG signal to PFI0)

I need to synchronize the CRIO chassis (e.g. 9057) to the GPS clock. Can I use an external GPS module (for example a Garmin) and connect the PPS (or IRIG) signal to the PFI0 input of the cRIO chassis? Does NI-SYNC allow me to configure such a timing source? 

I was using a GPS cRIO module and FPGA-Timekeeper to timestamp samples of a dynamic signal acquisition module. The dynamic signal modules were still running with their own clock and I had to resample the waveform. I would prefer if the chassis clock were synchronized to the GPS clock and the FPGA and all clocks were coherent. 

Is this principally possible? Is there an example? I could not find an explicit answer or example in the NI-Sync documentation or cRIO chassis documentation. 

 
 

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